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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 26 hours after estrus begins






2. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






3. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.


4. (LH) causes female's egg to break (her period)






5. Days which have decreasing daylight hours


6. Animal which has been castrated after puberty






7. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






8. Failure to have one testis (gonad) to descend






9. (switzerland) 2nd in size and milk production - most muscle -






10. Scar tissue plugs up chambers of udder






11. Prevent the cow from getting an infection from the calve






12. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






13. Located directly in front of the cervix. fertilized egg implants here. connected to two uterine horns. implantation occurs on the same side as ovulation occurred.






14. 336 days






15. Pulls sperm and egg together - gets body ready for pregnany - stimulates growth cells - develops mammary glands - starts to deposit fat.






16. Parturition is controlled by...






17. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






18. Birthing process (termination of gestation)






19. % of fat in milk. makes cheeses and ice cream. regulates cost of milk






20. 19-23 (21) days






21. 4-6 days






22. Days which have decreasing daylight hours


23. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






24. What makes the milk flow through the mammary glands?






25. ~60 days before calving






26. Hold the penis in the bulls body when not in use. releases penis before ejaculation or urination.






27. Front feet and head first. (except for hogs and dogs)






28. Sperm production






29. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






30. 1-2 days






31. 114 days






32. ~60 days before calving






33. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






34. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






35. Allows extension of penis without fibro-elastic penis






36. (FSH) causes egg to mature in females






37. Sperm is produced here






38. Can survive ~7 days in cow. vast majority <48 hours






39. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






40. 114 days






41. Parturition is controlled by...






42. Larger the cow - more milk is produced; smaller the cow - less milk is produced






43. 30-38 hours after estrus cycle begins






44. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






45. Why Dairy calves are fed powdered milk.






46. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






47. Can survive ~7 days in cow. vast majority <48 hours






48. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






49. Important 'landmark' during palpation






50. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed